Control Method of Multi-Antenna Module

1. A control method of a multi-antenna module, the control method comprising: providing a plurality of antennas, wherein the antennas at least generate signals in a first frequency band and signals in a second frequency band; dividing the antennas into a first group and a second group by detecting performance of the antennas in the first frequency band and the second frequency band, wherein antennas of the first group have better performance in the first frequency band than in the second frequency band, and antennas of the second group are antennas other than the antennas of the first group, and a number of the antennas of each of the first group and the second group is at least greater than or equal to 2; instructing the first group to generate the signals in the first frequency band, and instructing the second group to generate the signals in the second frequency band; operating, under an optimal setting, two of the antennas which have optimal antenna efficiencies, setting 30% to 50% of the optimal setting as an initial ratio, operating a plurality of remaining antennas of the antennas at a plurality of ratios with arithmetic increases from the initial ratio, and measuring a plurality of antenna efficiencies of the remaining antennas operating at the ratios to choose an optimized ratio from the ratios; and operating the remaining antennas at the optimized ratio.

2. The control method as claimed in claim 1 , wherein choosing the optimized ratio from the ratios comprises: comparing the antenna efficiencies corresponding to the ratios from a smaller value to a greater value, wherein when an increase of one of the antenna efficiencies from a previous one is less than a default value, the ratio corresponding to the one of the antenna efficiencies is set as the optimized ratio.

3. The control method as claimed in claim 1 , wherein the antennas are located in a casing of an electronic device and serve as a plurality of internal antennas, and the internal antennas are located at a plurality of corners in the casing.

4. The control method as claimed in claim 3 , further comprising: providing a plurality of external antennas, located outside the casing and at least generating signals in the first frequency band and signals of the second frequency band; determining whether a person or an object is approaching the casing; and upon receipt of an approaching signal, operating the external antennas under an optimal setting, and operating the internal antennas under a lower setting.

5. The control method as claimed in claim 4 , wherein operating the internal antennas under the lower setting comprises: setting 30% to 50% of the optimal setting as an initial ratio, operating the internal antennas at a plurality of ratios with arithmetic increases from the initial ratio, and measuring a plurality of antenna efficiencies of the internal antennas operating at the ratios to choose an optimized ratio from the ratios; and operating the internal antennas at the optimized ratio.

6. The control method as claimed in claim 4 , wherein operating the internal antennas under the lower setting comprises: operating the internal antennas at a plurality of ratios with arithmetic decreases from a default ratio, and measuring a plurality of antenna efficiencies of the internal antennas operating at the ratios to choose an optimized ratio from the ratios, wherein the default ratio is 70% to 100%; and operating the internal antennas at the optimized ratio.

7. The control method as claimed in claim 4 , wherein determining whether the person or the object is approaching the casing comprises: detecting whether the person or the object is approaching the casing by using at least one of an optical detection module, a sound reception module, a distance detection module, and a peripheral module, wherein the optical detection module comprises a human face recognition system or an infrared module, the sound reception module comprises a microphone, the distance detection module comprises an ultrasonic detection module, and the peripheral module is electrically connected to the electronic device and comprises a keyboard or a mouse.

8. A control method of a multi-antenna module, the control method comprising: providing a plurality of antennas, wherein the antennas at least generate signals in a first frequency band and signals in a second frequency band; dividing the antennas into a first group and a second group by detecting performance of the antennas in the first frequency band and the second frequency band, wherein antennas of the first group have better performance in the first frequency band than in the second frequency band, and antennas of the second group are antennas other than the antennas of the first group, and a number of the antennas of each of the first group and the second group is at least greater than or equal to 2; instructing the first group to generate the signals in the first frequency band, and instructing the second group to generate the signals in the second frequency band; operating, at a default ratio, two of the antennas which have optimal antenna efficiencies, the default ratio being 70% to 100%, operating a plurality of remaining antennas of the antennas at a plurality of ratios with arithmetic decreases from the default ratio, and measuring a plurality of antenna efficiencies of the remaining antennas operating at the ratios to choose an optimized ratio from the ratios; and operating the remaining antennas at the optimized ratio.

9. The control method as claimed in claim 8 , wherein choosing the optimized ratio from the ratios comprises: comparing the antenna efficiencies corresponding to the ratios from a greater value to a smaller value, wherein when a decrease of one of the antenna efficiencies from a previous one is greater than a default value, the ratio corresponding to the one of the antenna efficiencies is set as the optimized ratio.

10. A control method of a multi-antenna module, the control method comprising: providing a plurality of antennas, wherein the antennas at least generate signals in a first frequency band and signals in a second frequency band; dividing the antennas into a first group and a second group by detecting performance of the antennas in the first frequency band and the second frequency band, wherein antennas of the first group have better performance in the first frequency band than in the second frequency band, and antennas of the second group are antennas other than the antennas of the first group, and a number of the antennas of each of the first group and the second group is at least greater than or equal to 2; instructing the first group to generate the signals in the first frequency band, and instructing the second group to generate the signals in the second frequency band; operating the first group under an optimal setting, setting 30% to 50% of the optimal setting as an initial ratio, and operating the second group at a plurality of ratios with arithmetic increases from the initial ratio, or operating the first group at a default ratio, and operating the second group at a plurality of ratios with arithmetic decreases from the default ratio, wherein the default ratio is 70% to 100%; measuring a plurality of antenna efficiencies of the second group operating at the ratios to choose an optimized ratio from the ratios; and operating the second group at the optimized ratio.